Process command lines for Cygwin processes no longer viewable in Windows task manager as of Cygwin 1.7.21
Tom Honermann
thonermann@coverity.com
Thu Jul 25 15:14:00 GMT 2013
On 07/25/2013 09:21 AM, Charles Wilson wrote:
> On 7/25/2013 4:28 AM, Corinna Vinschen wrote:
>> On Jul 24 22:38, Tom Honermann wrote:
>>> My suspicion that this started with 1.7.21 is based on Corinna's
>>> comments in http://cygwin.com/ml/cygwin/2013-07/msg00343.html and
>>> other anecdotal evidence of new problems occurring as of that
>>> release.
>>
>> This is by design now as described in the aforementioned posting. If
>> you want to see the command line of a Cygwin application called by
>> another Cygwin application, see /proc/$pid/cmdline.
>
> Would a patch to restore the previous operation based on a $CYGWIN
> variable setting be acceptable?
I think this change should be reverted.
In my case, I need to be able to retrieve the command line for a Cygwin
process from a non-Cygwin process. Reading /proc/$pid/cmdline is not an
option in that case. I depend on the ability to, for example,
differentiate gcc processes that are running based on their command line
options.
Note that strace is currently broken as well. Running it against a
'make' invocation:
$ strace make | grep "cmd line"
2532 163533 [main] make 6688 child_info_spawn::worker: pid 6688,
prog_arg /usr/bin/g++, cmd line (null))
2207 158021 [main] g++ 6688 child_info_spawn::worker: pid 2180,
prog_arg /usr/lib/gcc/i686-pc-cygwin/4.7.3/cc1plus.exe, cmd line (null))
1292 680192 [main] g++ 6688 child_info_spawn::worker: pid 3604,
prog_arg
/usr/lib/gcc/i686-pc-cygwin/4.7.3/../../../../i686-pc-cygwin/bin/as.exe,
cmd line (null))
1274 989508 [main] g++ 6688 child_info_spawn::worker: pid 6176,
prog_arg /usr/lib/gcc/i686-pc-cygwin/4.7.3/collect2.exe, cmd line (null))
2305 385952 [main] collect2 6176 child_info_spawn::worker: pid 6340,
prog_arg
/usr/lib/gcc/i686-pc-cygwin/4.7.3/../../../../i686-pc-cygwin/bin/ld, cmd
line (null))
Note that "cmd line" is now (null) in all cases.
Tom.
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